I am a big guy (6'0 and 220) and love my '04 yz450 in the woods. I run stock gearing, CR high bars with Bark Busters and a Pro-Taper adjustable top triple clamp. I also added a FMF Power bomb supercross header to get better snap off the bottom. You have to ride with a lot of momentum. Kinda like ridding a big 125! I am going with a Rekluse clutch as soon as I can afford it.